JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
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IF 3.261
Lingling Wang,Penglun Zheng,Xuefei Zhou,Mingzhen Xu,Xiaobo Liu
Novel CdS/UiO-66-NH 2 heterojunction photocatalysts have been successfully fabricated via facile water bath deposition. Compared with the traditional preparation technology, such strategy introduces deionized water as solvent, reduces production cost and simplifies the fabrication process of the heterojunction photocatalyst. Characterizations indicate that CdS nanoparticles (NPs) are uniformly interspersed on the surface of UiO-66-NH 2 and the intimate contacted heterojunction interface is generated to prevent recombination of photogenerated charge carriers. CdS/UiO-66-NH 2 with a mass ratio of 1.5:1 (CdS: UiO-66-NH 2 ) exhibits the highest photocatalytic degradation rate for RhB of approximately 92.5% in 40 min and excellent photostability through four recycles. Furthermore, Photoluminescence (PL) spectra, UV–vis diffuse reflectance spectra (DRS), transient photocurrent, electrochemical impedance spectra (EIS), Nyquist plots and Mott-Schottky plots are applied to characterize the photoelectrochemical properties. The observably enhanced photocatalytic performance can be attributed to: 1) larger specific surface area, increased photocatalytic active sites, intimate contacted interface, 2) created n-n type heterojunction, and 3) rapid separation and transfer of photoexcited interfacial charges.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2023
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IF 6.1
Xiaobo Zhang,Zhiru Li,Lili Yang,Bing Hu,Qiuyue Zheng,Jiang Man,Jijuan Cao
The sensitive and accurate detection of ochratoxin A (OTA) is crucial for public health due to its high toxicity. Herein, using Au nanoparticle (NP)-attached CdS/UiO-66-NH2 heterostructures as photoactive materials, a photoelectrochemical (PEC) aptasensor was presented for the ultrasensitive assay of OTA based on a competitive displacement reaction triggering the trans-cleavage ability of CRISPR/Cas12a. In this sensing strategy, methylene blue-labeled single-stranded DNA (MB-ssDNA) was immobilized on the Au NPs/CdS/UiO-66-NH2 electrode to accelerate the separation of the photogenerated carrier, thus producing a significantly increased PEC response. In the presence of OTA, it specifically bound with the aptamer (Apt) and resulted in the release of the activation chain, triggering the trans-cleavage characteristics of CRISPR/Cas12a. MB-ssDNA was cut randomly on the electrode surface to convert the PEC signal from the “on” to the “off” state, thereby achieving a quantitative and accurate detection of OTA. The CRISPR/Cas12a-derived PEC aptasensor exhibited excellent sensitivity and specificity, with a linear range from 100 to 50 ng/mL and a detection limit of 38 fg/mL. Overall, the proposed aptasensor could provide a rapid, accurate, and sensitive method for the determination of OTA in actual samples.
研究领域:
食品安全检测
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分子生物学
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分析化学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Ziyao Mi,Xuzhen Liu,Yue Zhang,Bo Wang,Hongyu Guo,Yufeng Chen,Yanyan Du,Xinyu Wang,Xiaojun Hu,Jingxian Jiang
The discharge of industrial effluents containing heavy metal ions and organic dyes has laid heavy burdens on ecosystem, meanwhile, drawing extensive scientific attention globally. In this work, CdS/UiO-66-NH 2 heterojunction was uniformly loading on the aerogel skeleton composed of cellulose (CNF), chitosan (CS) and montmorillonite (MMT). The fabricated composite aerogel noted as CUN-CCMA was equipped with light density, a large specific area and a robust three-dimensional interpenetrating network. The MMT not only reinforced the mechanical stability of the aerogel, but also regulated the distribution of the heterojunction. The CUN-CCMA could adsorb various organic dyes and heavy metal ions, and the maximum adsorption capacities for methylene blue (MB) and Cu 2+ were 111.5 mg/g and 45.1 mg/g, respectively. The corresponding adsorption processes were in better consistence with the pseudo-second-order kinetic model and the Freundlich isotherm. The hydrogen bonding, electrostatic interaction, π-π stacking and chelating effect might be attributed to the adsorption mechanism. Most importantly, the removal efficiency of MB with a high concentration of 300 mg/L could reach 94 % when synergistic effect of adsorption and visible light photocatalytic degradation was exerted. The active species that played vital roles during the photodegradation process were recognized as ·OH and · O 2 − . Furthermore, the CUN-CCMA demonstrated an excellent reusability. These outstanding characteristics of CUN-CCMA broadened its application prospects in complicated sewage treatment.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Chemosensors
·
2026
·Vol. 14
·期 7
·156
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IF 4.4
Tong Xiang,Chongyang Zhang,Qiongqiong Ren,Jinlong Chang,Linyan Xie,Xuming Sun
Nitrite (NO2−) is a crucial environmental and food safety indicator, and excessive intake poses severe threats to human health; thus, highly sensitive and selective detection methods are urgently needed. Herein, a ratiometric fluorescent nanosensor based on N-CDs@UiO-66-NH2was constructed via a facile assembly strategy for sensitive and selective nitrite detection. The composite demonstrated dual-emission fluorescence at 456 nm and 730 nm under 365 nm excitation, originating from UiO-66-NH2and N-CDs, respectively, enabling an intrinsic self-referencing signal. The fluorescence intensity ratio exhibited a good linear response toward nitrite in the range of 10–100 μM and 100–450 μM with a limit of detection (LOD) 1.76 μM. The nanosensor showed high selectivity and anti-interference ability against various ions and molecules. Furthermore, it was successfully applied to nitrite detection in lake water samples with satisfactory recoveries (97–101%) and low relative standard deviations (<1.8%). This work provides a simple and effective approach for nitrite monitoring in environmental samples.
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DOI
高影响因子
危险品化学品经营许可证（带存储）